Want to add this to my plant list but need to know which name to use. Foliage is about 27 inches tall. Just bloomed yesterday (Technically it was the night before, hence the night photo.) Came from a local plant swap so I have no information.

Edit: It was identified as a Hymenocallis, no specific variety. Thanks for the answers!

I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others.
~~ Sharon Brown ~~

I just wanted to add the plant to my list ... I tried typing in 'Spider Lily Hymenocallis' but it was not recognized. Tried 'Spider Lily (Hymenocallis)' still not recognized. All the others are listed as Spider Lily (singular) something-or-other but...this one is a plural. Even when I typed in Spider Lilies (Hymenocallis) it was still not recognized. I had to cheat and use the 'add this plant...' easy button.